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A transformer and a phase-shifted full-bridge dc-dc converter

A phase-shifting full bridge and transformer technology, which is applied in the direction of transformer/inductor coil/winding/connection, DC power input conversion to DC power output, instruments, etc., which can solve the problem of affecting the working characteristics and stability of the transformer and increasing the energy loss of the transformer , The heat of the wire is not easy to dissipate, etc., to save the layout space, reduce the working temperature, improve the safety and stability

Active Publication Date: 2018-08-10
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore if figure 1 As shown, in the traditional phase-shifting full-bridge DC / DC converter, the winding wire 100 of the secondary winding of the high-frequency transformer should be very thick and have a small number of turns, so as to have enough cross-sectional area to carry a large current. It cannot be wound close to the magnetic core, resulting in leakage inductance, increased electromagnetic interference, harmonics, and increased energy loss of the transformer. At the same time, in the process of magnetoelectric conversion, this winding method is easy to make the heat generated by the wire difficult to dissipate. , causing the temperature to rise, affecting the working characteristics and stability of the transformer
[0004] On the secondary side of the high-frequency transformer of the traditional phase-shifted full-bridge DC / DC converter, when the output load changes or even suddenly short-circuits, the current flowing through the secondary side is slowly established due to the existence of a large output filter inductance , causing the system dynamic response speed to be relatively slow, and effective adjustment and protection measures cannot be taken in time

Method used

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  • A transformer and a phase-shifted full-bridge dc-dc converter
  • A transformer and a phase-shifted full-bridge dc-dc converter
  • A transformer and a phase-shifted full-bridge dc-dc converter

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Embodiment 1

[0030] Example 1: Please refer to Figure 2 to Figure 4 ,

[0031] A transformer used to realize high-voltage to low-voltage high-current conversion output, which includes a magnetic core 10, a primary coil 20, and a secondary plate ring 30. The secondary plate ring 30 is formed by wrapping a metal plate around the magnetic core, and the metal plate is wrapped around the magnetic core. The starting end and the terminating end of the coil form two high and low voltage output ends of the secondary plate coil, and the primary coil 20 is formed by a metal wire wrapped magnetic core commonly used in existing transformers. According to the transformation ratio of the transformer, the number of turns of the secondary plate coil 30 and the number of turns of the primary coil 20 are designed. In this embodiment, the number of turns of the secondary plate coil 30 is fixed as one turn (that is, the metal plate only wraps the magnetic core One turn), and then design the number of turns o...

Embodiment 2

[0035] Example 2: Please refer to Figure 2 to Figure 5 ,

[0036] A phase-shifting full-bridge DC-DC converter, which includes an input power source 1, a leading bridge arm 2 formed by a first MOSFET tube and a second MOSFET tube, and a lagging bridge arm formed by a third MOSFET tube and a fourth MOSFET tube 3. High frequency transformer 4, rectifier circuit 5 and load circuit 6. The midpoint of the leading bridge arm 2 and the lagging bridge arm 3 is connected to the primary side of the high-frequency transformer 4, the secondary side of the high-frequency transformer 4 is connected to the rectifier circuit 5, and the rectifier circuit 5 is connected to the load circuit 6. The high-frequency transformer 4 here uses A transformer described in Embodiment 1.

[0037]The rectifier circuit 5 includes a first silicon-controlled rectifier and a second silicon-controlled rectifier, the rectifier circuit 5 with soft switching control is formed by the first silicon-controlled recti...

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Abstract

The invention discloses a novel transformer and a phase-shifted full-bridge DC-DC converter. The novel transformer is used for achieving low-voltage large-current conversion output and comprises a magnetic core, a primary coil and a secondary board coil. The secondary board coil is formed by wrapping the magnetic core through a metal board. The initiating terminal and the ending terminal wrapped by the metal board are the two output ends of the secondary board coil. The phase-shifted full-bridge DC-DC converter comprises an ahead bridge arm, a lag bridge arm, a high-frequency transformer and a rectifying circuit. The novel transformer is adopted as the high-frequency transformer. The novel transformer has the following advantages of reducing the size of the transformer and the converter and good in heat dissipating effect.

Description

technical field [0001] The invention relates to a transformer and a phase-shifting full-bridge DC-DC converter, in particular to a transformer for realizing low-voltage and high-current conversion output, and a phase-shifting full-bridge DC-DC converter using the transformer. Background technique [0002] Since the 1990s, after decades of development, the phase-shifted full-bridge soft-switching DC / DC conversion circuit has gradually become mature, and has increasingly become the mainstream of medium-to-high-power DC converters. Compared with other DC / DCs, the phase-shifted full-bridge soft switching has the following advantages: the converter makes full use of the parasitic parameters of the circuit itself, and the circuit structure is simple; the switching tube works in the soft switching state, which reduces the switching loss, so the converter has High efficiency; the working mode of zero-voltage switching makes the MOSFET in the converter work at a very high switching f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/28H02M3/335
Inventor 郭新华张莹文郭保甲夏良
Owner HUAQIAO UNIVERSITY